1 /* 2 * Copyright (c) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com> 3 * 4 * Permission to use, copy, modify, distribute, and sell this software and its 5 * documentation for any purpose is hereby granted without fee, provided that 6 * the above copyright notice appear in all copies and that both that copyright 7 * notice and this permission notice appear in supporting documentation, and 8 * that the name of the copyright holders not be used in advertising or 9 * publicity pertaining to distribution of the software without specific, 10 * written prior permission. The copyright holders make no representations 11 * about the suitability of this software for any purpose. It is provided "as 12 * is" without express or implied warranty. 13 * 14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 20 * OF THIS SOFTWARE. 21 */ 22 #ifndef __DRM_FOURCC_H__ 23 #define __DRM_FOURCC_H__ 24 25 #include <linux/types.h> 26 #include <uapi/drm/drm_fourcc.h> 27 28 /** 29 * DRM_FORMAT_MAX_PLANES - maximum number of planes a DRM format can have 30 */ 31 #define DRM_FORMAT_MAX_PLANES 4u 32 33 /* 34 * DRM formats are little endian. Define host endian variants for the 35 * most common formats here, to reduce the #ifdefs needed in drivers. 36 * 37 * Note that the DRM_FORMAT_BIG_ENDIAN flag should only be used in 38 * case the format can't be specified otherwise, so we don't end up 39 * with two values describing the same format. 40 */ 41 #ifdef __BIG_ENDIAN 42 # define DRM_FORMAT_HOST_XRGB1555 (DRM_FORMAT_XRGB1555 | \ 43 DRM_FORMAT_BIG_ENDIAN) 44 # define DRM_FORMAT_HOST_RGB565 (DRM_FORMAT_RGB565 | \ 45 DRM_FORMAT_BIG_ENDIAN) 46 # define DRM_FORMAT_HOST_XRGB8888 DRM_FORMAT_BGRX8888 47 # define DRM_FORMAT_HOST_ARGB8888 DRM_FORMAT_BGRA8888 48 #else 49 # define DRM_FORMAT_HOST_XRGB1555 DRM_FORMAT_XRGB1555 50 # define DRM_FORMAT_HOST_RGB565 DRM_FORMAT_RGB565 51 # define DRM_FORMAT_HOST_XRGB8888 DRM_FORMAT_XRGB8888 52 # define DRM_FORMAT_HOST_ARGB8888 DRM_FORMAT_ARGB8888 53 #endif 54 55 struct drm_device; 56 struct drm_mode_fb_cmd2; 57 58 /** 59 * struct drm_format_info - information about a DRM format 60 */ 61 struct drm_format_info { 62 /** @format: 4CC format identifier (DRM_FORMAT_*) */ 63 u32 format; 64 65 /** 66 * @depth: 67 * 68 * Color depth (number of bits per pixel excluding padding bits), 69 * valid for a subset of RGB formats only. This is a legacy field, do 70 * not use in new code and set to 0 for new formats. 71 */ 72 u8 depth; 73 74 /** @num_planes: Number of color planes (1 to 3) */ 75 u8 num_planes; 76 77 union { 78 /** 79 * @cpp: 80 * 81 * Number of bytes per pixel (per plane), this is aliased with 82 * @char_per_block. It is deprecated in favour of using the 83 * triplet @char_per_block, @block_w, @block_h for better 84 * describing the pixel format. 85 */ 86 u8 cpp[DRM_FORMAT_MAX_PLANES]; 87 88 /** 89 * @char_per_block: 90 * 91 * Number of bytes per block (per plane), where blocks are 92 * defined as a rectangle of pixels which are stored next to 93 * each other in a byte aligned memory region. Together with 94 * @block_w and @block_h this is used to properly describe tiles 95 * in tiled formats or to describe groups of pixels in packed 96 * formats for which the memory needed for a single pixel is not 97 * byte aligned. 98 * 99 * @cpp has been kept for historical reasons because there are 100 * a lot of places in drivers where it's used. In drm core for 101 * generic code paths the preferred way is to use 102 * @char_per_block, drm_format_info_block_width() and 103 * drm_format_info_block_height() which allows handling both 104 * block and non-block formats in the same way. 105 * 106 * For formats that are intended to be used only with non-linear 107 * modifiers both @cpp and @char_per_block must be 0 in the 108 * generic format table. Drivers could supply accurate 109 * information from their drm_mode_config.get_format_info hook 110 * if they want the core to be validating the pitch. 111 */ 112 u8 char_per_block[DRM_FORMAT_MAX_PLANES]; 113 }; 114 115 /** 116 * @block_w: 117 * 118 * Block width in pixels, this is intended to be accessed through 119 * drm_format_info_block_width() 120 */ 121 u8 block_w[DRM_FORMAT_MAX_PLANES]; 122 123 /** 124 * @block_h: 125 * 126 * Block height in pixels, this is intended to be accessed through 127 * drm_format_info_block_height() 128 */ 129 u8 block_h[DRM_FORMAT_MAX_PLANES]; 130 131 /** @hsub: Horizontal chroma subsampling factor */ 132 u8 hsub; 133 /** @vsub: Vertical chroma subsampling factor */ 134 u8 vsub; 135 136 /** @has_alpha: Does the format embeds an alpha component? */ 137 bool has_alpha; 138 139 /** @is_yuv: Is it a YUV format? */ 140 bool is_yuv; 141 }; 142 143 /** 144 * drm_format_info_is_yuv_packed - check that the format info matches a YUV 145 * format with data laid in a single plane 146 * @info: format info 147 * 148 * Returns: 149 * A boolean indicating whether the format info matches a packed YUV format. 150 */ 151 static inline bool 152 drm_format_info_is_yuv_packed(const struct drm_format_info *info) 153 { 154 return info->is_yuv && info->num_planes == 1; 155 } 156 157 /** 158 * drm_format_info_is_yuv_semiplanar - check that the format info matches a YUV 159 * format with data laid in two planes (luminance and chrominance) 160 * @info: format info 161 * 162 * Returns: 163 * A boolean indicating whether the format info matches a semiplanar YUV format. 164 */ 165 static inline bool 166 drm_format_info_is_yuv_semiplanar(const struct drm_format_info *info) 167 { 168 return info->is_yuv && info->num_planes == 2; 169 } 170 171 /** 172 * drm_format_info_is_yuv_planar - check that the format info matches a YUV 173 * format with data laid in three planes (one for each YUV component) 174 * @info: format info 175 * 176 * Returns: 177 * A boolean indicating whether the format info matches a planar YUV format. 178 */ 179 static inline bool 180 drm_format_info_is_yuv_planar(const struct drm_format_info *info) 181 { 182 return info->is_yuv && info->num_planes == 3; 183 } 184 185 /** 186 * drm_format_info_is_yuv_sampling_410 - check that the format info matches a 187 * YUV format with 4:1:0 sub-sampling 188 * @info: format info 189 * 190 * Returns: 191 * A boolean indicating whether the format info matches a YUV format with 4:1:0 192 * sub-sampling. 193 */ 194 static inline bool 195 drm_format_info_is_yuv_sampling_410(const struct drm_format_info *info) 196 { 197 return info->is_yuv && info->hsub == 4 && info->vsub == 4; 198 } 199 200 /** 201 * drm_format_info_is_yuv_sampling_411 - check that the format info matches a 202 * YUV format with 4:1:1 sub-sampling 203 * @info: format info 204 * 205 * Returns: 206 * A boolean indicating whether the format info matches a YUV format with 4:1:1 207 * sub-sampling. 208 */ 209 static inline bool 210 drm_format_info_is_yuv_sampling_411(const struct drm_format_info *info) 211 { 212 return info->is_yuv && info->hsub == 4 && info->vsub == 1; 213 } 214 215 /** 216 * drm_format_info_is_yuv_sampling_420 - check that the format info matches a 217 * YUV format with 4:2:0 sub-sampling 218 * @info: format info 219 * 220 * Returns: 221 * A boolean indicating whether the format info matches a YUV format with 4:2:0 222 * sub-sampling. 223 */ 224 static inline bool 225 drm_format_info_is_yuv_sampling_420(const struct drm_format_info *info) 226 { 227 return info->is_yuv && info->hsub == 2 && info->vsub == 2; 228 } 229 230 /** 231 * drm_format_info_is_yuv_sampling_422 - check that the format info matches a 232 * YUV format with 4:2:2 sub-sampling 233 * @info: format info 234 * 235 * Returns: 236 * A boolean indicating whether the format info matches a YUV format with 4:2:2 237 * sub-sampling. 238 */ 239 static inline bool 240 drm_format_info_is_yuv_sampling_422(const struct drm_format_info *info) 241 { 242 return info->is_yuv && info->hsub == 2 && info->vsub == 1; 243 } 244 245 /** 246 * drm_format_info_is_yuv_sampling_444 - check that the format info matches a 247 * YUV format with 4:4:4 sub-sampling 248 * @info: format info 249 * 250 * Returns: 251 * A boolean indicating whether the format info matches a YUV format with 4:4:4 252 * sub-sampling. 253 */ 254 static inline bool 255 drm_format_info_is_yuv_sampling_444(const struct drm_format_info *info) 256 { 257 return info->is_yuv && info->hsub == 1 && info->vsub == 1; 258 } 259 260 /** 261 * drm_format_info_plane_width - width of the plane given the first plane 262 * @info: pixel format info 263 * @width: width of the first plane 264 * @plane: plane index 265 * 266 * Returns: 267 * The width of @plane, given that the width of the first plane is @width. 268 */ 269 static inline 270 int drm_format_info_plane_width(const struct drm_format_info *info, int width, 271 int plane) 272 { 273 if (!info || plane >= info->num_planes) 274 return 0; 275 276 if (plane == 0) 277 return width; 278 279 return width / info->hsub; 280 } 281 282 /** 283 * drm_format_info_plane_height - height of the plane given the first plane 284 * @info: pixel format info 285 * @height: height of the first plane 286 * @plane: plane index 287 * 288 * Returns: 289 * The height of @plane, given that the height of the first plane is @height. 290 */ 291 static inline 292 int drm_format_info_plane_height(const struct drm_format_info *info, int height, 293 int plane) 294 { 295 if (!info || plane >= info->num_planes) 296 return 0; 297 298 if (plane == 0) 299 return height; 300 301 return height / info->vsub; 302 } 303 304 const struct drm_format_info *__drm_format_info(u32 format); 305 const struct drm_format_info *drm_format_info(u32 format); 306 const struct drm_format_info * 307 drm_get_format_info(struct drm_device *dev, 308 const struct drm_mode_fb_cmd2 *mode_cmd); 309 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth); 310 uint32_t drm_driver_legacy_fb_format(struct drm_device *dev, 311 uint32_t bpp, uint32_t depth); 312 unsigned int drm_format_info_block_width(const struct drm_format_info *info, 313 int plane); 314 unsigned int drm_format_info_block_height(const struct drm_format_info *info, 315 int plane); 316 uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, 317 int plane, unsigned int buffer_width); 318 319 #endif /* __DRM_FOURCC_H__ */ 320